Capacitance Autowide AWC Series

Overview

Continuous maintenance-free operation Next-generation CPC Sensor Using Electric Flux Lines

The Capacitance Autowide Sensor AWC is a sensor system that provides continuous, contactless detection of the center position of a strip moving on a line, for use in Center Position Control (CPC). Like our previous sensors, the sensor is maintenance free and can be used continuously with no decline in sensitivity caused by wear over time, giving stable, long-term service. The sensor is now a far easier product to use, offering improvements such as taking away the need for on-field calibration*.
* If there are metal structural elements close to the sensor, some simple adjustment may be required.

Feature

• No field calibration required
• Maintenance free
• Uninfluenced by light
• Insensitive to dirt, scale
• Unaffected by passline changes or wavy edges

Operating principles

The Capacitance Autowide AWC Series generates lines of electric force between electrodes situated on each side of the strip, and calculates the position of the strip between the electrodes from the changing amount in the number of lines (see Figure 1). The sensor has two sets of transmission and reception electrodes that are installed opposite each other with the strip between them. The transmitter electrode generates electric force lines and the receiver receives them. When a strip enters between the transmitter and reception electrodes, the difference in the blocked transmitter electrodes causes a variation in the force lines received by the reception electrodes (see Figure 2). Therefore, by calculating the lines of electric force received by the reception electrodes, the position of the strip becomes apparent.

Specifications

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